This question already has answers here: 开发者_JAVA技巧 How to remove leading and trailing spaces from a string
I\'m trying to read a zip file, check that it has some required files, and then write all valid files out to another zip file. The basic introduction to java.util.zip has a lot of Java-isms and I\'d l
I have some big (more than 3 fields) objects that can and should be immutable. Every time I run into that case I tend to create constructor abominations with long parameter lists.
In the Design Guidelines for Developing Class Libraries, Microsoft say: Do not assign instances of mutable types to read-only fields.
I\'m studying the best data structures to implement a simple open-source object temporal database, and currently I\'m very fond of using Persistent Red-Black trees to do it.
I have tried this but it does not work: val map:Map[String,String] = for { tuple2 <- someList } yield tuple2._1 -> tuple2._2
Can someone explain why the example with integers results in different values for x and y and the example with the list results in x and y being the same object?
In particular an immutable List with a cons operation would be wel开发者_JS百科come. Dug around a little bit longer. This library probably comes closest: http://functionaljava.googlecode.com/svn/artif
I to need modify the values {place} and {other_place} in the op record. #op{ action= [walk, from, {place}, to, {other_place}],
Today I was reading through some Hibernate code and I encounter something interesting. There is a class called CollectionHelper that defines the following constant varibale:
加载中,请稍侯......